JPH02214477A - Vibration wave device - Google Patents
Vibration wave deviceInfo
- Publication number
- JPH02214477A JPH02214477A JP1035348A JP3534889A JPH02214477A JP H02214477 A JPH02214477 A JP H02214477A JP 1035348 A JP1035348 A JP 1035348A JP 3534889 A JP3534889 A JP 3534889A JP H02214477 A JPH02214477 A JP H02214477A
- Authority
- JP
- Japan
- Prior art keywords
- vibration wave
- elastic body
- vibration
- grooves
- groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000000750 progressive effect Effects 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000001788 irregular Effects 0.000 abstract 1
- 238000005452 bending Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000003287 optical effect Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000012212 insulator Substances 0.000 description 4
- 230000011514 reflex Effects 0.000 description 4
- 239000006096 absorbing agent Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Landscapes
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は振動波装置、特に進行波型の振動波モータにお
ける振動体の構造に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of a vibrating body in a vibration wave device, particularly a traveling wave type vibration wave motor.
弾性体に進行性振動波を生じさせ、この振動によってロ
ータ等の移動体を移動させる振動波モータは、小型であ
り、また低速時に高いトルクが得られることがら、近年
−眼レフカメラの撮影レンズ駆動用として採用された。Vibration wave motors, which generate progressive vibration waves in an elastic body and use these vibrations to move a moving body such as a rotor, are small and can provide high torque at low speeds, so in recent years they have been used as photographic lenses for reflex cameras. It was adopted for driving purposes.
第２図は振動波モータを、撮影レンズ駆動用として組込
んだ一眼レフカメラの撮影レンズの縦断面図で、１は撮
影レンズの光軸りを回転中心とする、円環状の金属性の
弾性体で、後述するロータ３に接する側には第３図に示
される様に所定の幅ｔと深さｈの溝ＩＡが全周にわたっ
て設けられている。また該弾性体１の下部にはＰＺＴ等
の圧電素子２が接着剤により固定されている。電気−機
械エネルギー変換素子としての該圧電素子２に対しては
公知の方法で、位相と異なる超音波の駆動信号が印加さ
れ、この信号に応答して弾性体１が振動することによっ
て振動体を形成する弾性体ｌの周方向に回転する進行性
振動波が発生する。３は弾性体ｌの上面に加圧接触した
端部を有する円、環状のロータで、移動体としての該ロ
ータ３の他端にはゴム等の円環状の第１の吸振体５が設
けられている。４はフェルト等で形成された円環状の振
動絶縁体で、該絶縁体４はフェルト台８を介して重ね合
わされた２枚の皿バネ９から加圧力を受けている。Figure 2 is a vertical cross-sectional view of a single-lens reflex camera lens incorporating a vibration wave motor for driving the lens. As shown in FIG. 3, a groove IA having a predetermined width t and depth h is provided over the entire circumference on the side that contacts the rotor 3, which will be described later. Further, a piezoelectric element 2 made of PZT or the like is fixed to the lower part of the elastic body 1 with an adhesive. Using a known method, an ultrasonic drive signal having a different phase is applied to the piezoelectric element 2 as an electro-mechanical energy conversion element, and the elastic body 1 vibrates in response to this signal, thereby causing the vibrating body to vibrate. A progressive vibration wave is generated that rotates in the circumferential direction of the formed elastic body l. Reference numeral 3 denotes a circular, annular rotor having an end that is in pressurized contact with the upper surface of the elastic body l, and a first annular vibration absorber 5 made of rubber or the like is provided at the other end of the rotor 3 as a moving body. ing. Reference numeral 4 denotes an annular vibration insulator made of felt or the like, and the insulator 4 receives pressing force from two disc springs 9 superimposed on each other via a felt base 8 .
前述のロータ３は前記したＦｌの吸振体５を介して連結
板に密接保持される。円環状の連結板２２は６本の締め
付はビス（不図示）により出力伝達体２５と固定される
。光軸りを回転中心として回転する出力伝達体２５はボ
ール１０を用いてボールレース１３．１４で玉軸受けを
構成している。ボールレース１３． １４は撮影レンズ
の外筒１２に固定され、外筒１２は固定筒１１と結合さ
れ、カメラマウント１９に固定される。出力伝達体２５
の先端には連結コロ１５が固定され、光軸方向に設けら
れたフォーカスレンズ２７を保持した移動環１７のキー
溝（不図示）と係合する。固定内筒１８のネジ部１８ａ
と移動環１７のネジ部１７ａがヘリコイド結合しており
、出力伝達体２５の回転運動によって連結コロ１５を介
して移動環１７は回転しながら光軸方向へ移動可能とな
る。The rotor 3 described above is closely held by the connecting plate via the vibration absorber 5 of Fl. The annular connecting plate 22 is fixed to the output transmission body 25 with six fastening screws (not shown). The output transmission body 25, which rotates around the optical axis, uses balls 10 and constitutes a ball bearing with ball races 13 and 14. Ball race 13. 14 is fixed to the outer barrel 12 of the photographic lens, and the outer barrel 12 is combined with the fixed barrel 11 and fixed to the camera mount 19. Output transmission body 25
A connecting roller 15 is fixed to the tip thereof, and engages with a keyway (not shown) of a movable ring 17 that holds a focus lens 27 provided in the optical axis direction. Threaded portion 18a of fixed inner cylinder 18
The screw portion 17a of the movable ring 17 is helicoidally coupled to the movable ring 17, and the movable ring 17 can be rotated and moved in the optical axis direction via the connecting rollers 15 by the rotational movement of the output transmission body 25.
かかる構成において、カメラ側からのＡＦ倍信号たは、
マニュアルリング１６からの駆動信号によって該振動体
１．２に公知の方法で進行性振動波を発生させ、ロータ
３を回転させて最終的にフォーカスレンズ２７を光軸方
向へ移動させ、ピント調整を行うものである。In such a configuration, the AF multiplied signal from the camera side or
A driving signal from the manual ring 16 causes the vibrating body 1.2 to generate progressive vibration waves using a known method, rotates the rotor 3, and finally moves the focus lens 27 in the optical axis direction to adjust the focus. It is something to do.
そしてかかる従来装置の場合、この振動体１，２は駆動
用進行性振動波が振動体上のどの位置でも同じ振幅、同
じ波長となる様に均一な部材で形成され、かつ第３図示
のようにほぼ均一な構造となっていた。In the case of such a conventional device, the vibrating bodies 1 and 2 are formed of a uniform member so that the progressive vibration wave for driving has the same amplitude and the same wavelength at any position on the vibrating body, and as shown in the third figure. It had an almost uniform structure.
〔発明が解決しようとしている問題点〕しかしながら、
上記従来装置では振動体、移動体、或いはそれらの保持
部材の加工後の平面度誤差が、両面（振動体と移動体）
の接触面に面圧ムラを引き起こし、かかる原因により駆
動用進行性振動波とは異なった波長の進行性振動波が成
長し、騒音が発生することがあった。[Problem that the invention is trying to solve] However,
In the above conventional device, the flatness error after machining of the vibrating body, moving body, or their holding member is
This causes surface pressure unevenness on the contact surface of the contact surface, and due to this cause, a progressive vibration wave having a wavelength different from that of the driving progressive vibration wave grows, and noise may be generated.
本発明はかかる問題を解決した、騒音発生が抑えられた
振動波装置を提供するもので、本発明は振動波装置の少
なくとも１つの部材、たとえば弾性体、振動絶縁体等の
部材における、騒音を発生さ置に該部材の動剛性を不均
一とする溝、穴、突起／
物等の手段を設け、前記振動波が進行波に成長すること
を阻止するようにしたものである。The present invention solves this problem by providing a vibration wave device in which noise generation is suppressed. Means such as grooves, holes, protrusions, etc. that make the dynamic rigidity of the member non-uniform are provided at the generation location to prevent the vibration waves from growing into traveling waves.
第１図は本発明を適用した一眼レフカメラ用撮影レンズ
に於ける振動波モータの弾性体ｌと電気−機械エネルギ
ー変換素子としての圧電素子２の要部斜視図である。該
第１図示撮影レンズは第２図、第３図示撮影レンズのそ
れとほぼ同じであるので第２図示撮影レンズと異なる機
素についてのみ説明し、他の機素についての説明は省略
する。第１図において、ｌは振動波モータの主要な構成
部分を形成する円環状の弾性体で、移動体としてのロー
タ３（第２図窯番）との接触面に幅ｔＩ＋深さｈｌの多
数の溝ＩＡが全周にわたって設けられている。またこれ
らの溝の一部はＩＢとして図示される様に深さｈ２の深
溝となっている。騒音を発生する振動の波の数が、例え
ば３個の時（以後この波の数が弾性体ｌに生じた時の曲
げ振動を３次モードの曲げ振動と称し、ｎ個の波が弾性
体ｌに生じた時の曲げ振動を０次モードの曲げ振動と称
す）には、この深溝ＩＢはピッチθ＝６０°の間隔で６
個設けられる。また騒音を発生する曲げ振動の波の数が
ｎ個、すなわち０次モードの曲げ振動の時には、この深
溝ＩＢはピッは電気−機械エネルギー変換素子としての
ＰＺＴ等の圧電素子で、第２図示従来装置と同様に弾性
体ｌの一方の端面に接着剤で貼着される。該圧電素子２
のＡ相駆動領域を形成する各領域２Ａ、〜２Ａ７及びＢ
相駆動領域を形成する各領域２Ｂ、〜２Ｂ７は第１図示
の様に交互に異なる分極方向に分極され、またＡ相駆動
領域中の領域２Ａ、とＢ相駆動領域中の領域２Ｂ、との
間にはＡ相、Ｂ相駆動領域の夫々に共通で、不図宗の駆
動源のアースに接続される共通電極２Ｃが設けられる。FIG. 1 is a perspective view of essential parts of an elastic body 1 of a vibration wave motor and a piezoelectric element 2 as an electro-mechanical energy conversion element in a photographing lens for a single-lens reflex camera to which the present invention is applied. Since the photographic lens shown in the first diagram is almost the same as that of the photographic lens shown in FIGS. 2 and 3, only the elements that are different from the photographic lens shown in the second diagram will be explained, and the explanation of other elements will be omitted. In Fig. 1, l is an annular elastic body forming the main component of the vibration wave motor, and a large number of width tI + depth hl is formed on the contact surface with the rotor 3 (kiln number in Fig. 2) as a moving body. A groove IA is provided all around the circumference. Further, some of these grooves are deep grooves with a depth h2 as shown as IB. When the number of vibration waves that generate noise is, for example, three (hereinafter, the bending vibration when this number of waves occurs in the elastic body l will be referred to as third-order mode bending vibration, and the number of waves that occur in the elastic body (The bending vibration that occurs at
Each is provided. Further, when the number of waves of bending vibration that generates noise is n, that is, the bending vibration is in the zero-order mode, the deep groove IB is formed by a piezoelectric element such as PZT as an electro-mechanical energy conversion element, as shown in the second figure. Similar to the device, it is attached to one end surface of the elastic body 1 with adhesive. The piezoelectric element 2
Each region 2A, to 2A7 and B forming the A-phase drive region of
The regions 2B, to 2B7 forming the phase drive region are alternately polarized in different polarization directions as shown in the first diagram, and the region 2A in the A phase drive region and the region 2B in the B phase drive region are A common electrode 2C is provided in between, which is common to each of the A-phase and B-phase drive regions and is connected to the ground of a common drive source.
また入相、Ｂ相駆動領域を形成する各領域２Ａ、〜２Ａ
７，２Ｂ、〜２Ｂ７の幅は弾性体ｌの曲げ振動の波長λ
の残に設定され、更に共通電極２Ｃとセンサ電極２Ｄの
幅の和は波長λに設定されている。前記共通電極２Ｃと
対向する側に設けられた前記Ａ相駆動領域を形成するノ
各領域２Ａ１〜２Ａ、上の電極は不図示の第１交流電源
に接続される。また前記共通電極２Ｃと対向する側に設
けられた前記Ｂ相駆動領域を形成する各領域２Ｂ、〜２
Ｂ、上の電極は前記交流電源の出力信号と９０°位相差
のある交流信号を出力する不図示の第２交流電源に接続
される。そして前記Ａ相駆動領域２Ａ、〜２Ａ、の夫々
と前記領域２Ａ、〜２Ａ７の夫々と対応するＢ相駆動領
域２Ｂ、〜２Ｂ２の夫々とはλ／４離間されて設けられ
ている。In addition, each region 2A, ~2A forming the phase input and B phase drive regions
The width of 7, 2B, ~2B7 is the wavelength λ of the bending vibration of the elastic body l.
Furthermore, the sum of the widths of the common electrode 2C and the sensor electrode 2D is set to the wavelength λ. The upper electrodes of each region 2A1 to 2A forming the A-phase drive region provided on the side facing the common electrode 2C are connected to a first AC power source (not shown). Further, each region 2B, ~2 forming the B-phase drive region provided on the side facing the common electrode 2C
B, the upper electrode is connected to a second AC power source (not shown) that outputs an AC signal having a phase difference of 90 degrees from the output signal of the AC power source. The A-phase drive regions 2A, 2A and the B-phase drive regions 2B, 2B2 corresponding to the regions 2A, 2A7 are spaced apart by λ/4.
かかる構成の撮影レンズの動作について説明する。前記
第１．第２交流電源によって圧電素子２のＡ相駆動領域
及びＢ相駆動領域に交流信号を供給すると、圧電素子２
の曲げ振動によって弾性体ｌには８個の波からなる進行
性振動波、換言すれば８次モードの進行性振動波が発生
し、該振動波によってロータ３（第２図参照）は光軸り
を中心として回転する。その結果フォーカスレンズ２７
は光軸りに沿って移動して合焦動作が実行される。The operation of the photographic lens having such a configuration will be explained. Said 1st. When an AC signal is supplied to the A-phase drive region and the B-phase drive region of the piezoelectric element 2 by the second AC power supply, the piezoelectric element 2
Due to the bending vibration, a progressive vibration wave consisting of eight waves, in other words, a progressive vibration wave of the 8th mode, is generated in the elastic body l, and the vibration wave causes the rotor 3 (see Fig. 2) to move toward the optical axis. Rotates around the center. As a result, focus lens 27
is moved along the optical axis to perform a focusing operation.
以上の説明は振動波モータが正常に動作した時の動作説
明であるが、動作中或いは動作開始時から騒音を発生す
る可能性のある８次モードの曲げ振動、たとえば３次モ
ードの曲げ振動が弾性体ｌ上に発生した時の動作につい
て以下に説明する。第１図示の様な不均一構造の弾性体
の場合、深溝ＩＢの所を節とする３次モードの振動波に
於ける弾性体１の固有振動数は高く、一方探溝ＩＢの所
を腹とする３次モードの振動波に於ける弾性体ｌの固有
振動数は前述の固有振動数より低いものとなる。この様
に３次モードの振動波の夫々の位置に於ける弾性体ｌの
固有振動数は異なるので、騒音を発生する可能性のある
３次モードの振動波は進行波となり得ず、従って３次モ
ードの振動波が何らかの原因によって発生してもそれに
よって騒音が発生することはないものである。The above explanation is an explanation of the operation when the vibration wave motor is operating normally, but the 8th mode bending vibration, such as the 3rd mode bending vibration, which may generate noise during operation or from the start of operation, The operation when it occurs on the elastic body 1 will be explained below. In the case of an elastic body with a non-uniform structure as shown in Figure 1, the natural frequency of the elastic body 1 in the 3rd mode vibration wave with the node at the deep groove IB is high, while the frequency at the search groove IB is high. The natural frequency of the elastic body l in the third-order mode vibration wave is lower than the above-mentioned natural frequency. In this way, since the natural frequencies of the elastic body l differ at each position of the 3rd mode vibration wave, the 3rd mode vibration wave that may generate noise cannot become a traveling wave, and therefore the 3rd mode vibration wave cannot become a traveling wave. Even if vibration waves in the next mode are generated for some reason, they do not cause noise.
尚、第１図示実施例では弾性体ｌの所定の位置、即ち騒
音を発生させる可能性のある３次モードの振動波のλの
％の整数倍（以下γλ／２と記す、但しγは整数）に対
応する位置に弾性体１の動剛性を部分的に不均一とする
深溝ＩＢを設けたが、この深溝ＩＢの位置の溝を逆に浅
くして、弾性体の動剛性／
ｌを部分的に不均一としても前述と同様な効果が生しる
。In the first illustrated embodiment, a predetermined position of the elastic body l, that is, an integer multiple of % of λ of a third-order mode vibration wave that may generate noise (hereinafter referred to as γλ/2, where γ is an integer ), deep grooves IB are provided to partially make the dynamic stiffness of the elastic body 1 non-uniform, but the grooves at the positions of the deep grooves IB are conversely made shallower so that the dynamic stiffness/l of the elastic body is partially The same effect as described above is produced even if the surface is non-uniform.
上の位置）に不均一部分を設けたが、弾性体ｌは第３図
示のような均一な弾性体とし、第２図に示され対応した
位置に切欠き（第１図参照）、穴等によって不均一部分
を設ける様にしても良いし、また同様な対策を第２図に
示される吸振体５、出力伝達体２５に施しても良い。付
言すれば振動波モータの構成要素或いは該モータに連結
された装置の構成要様な不均一部分を設けることにより
騒音を防止出来るものである。Although the elastic body l is a uniform elastic body as shown in Figure 3, there are notches (see Figure 1), holes, etc. in the corresponding positions shown in Figure 2. Alternatively, similar measures may be taken for the vibration absorber 5 and the output transmitter 25 shown in FIG. 2. In addition, noise can be prevented by providing non-uniform parts such as the constituent elements of the vibration wave motor or the configuration of devices connected to the motor.
第４図は第１図示弾性体ｌの他の実施例を示すもので、
第１図示実施例で示される歯ＩＣの一部を高さの低い歯
ＩＤで構成して弾性体ｌの一部に不均一部分を形成した
例である。FIG. 4 shows another embodiment of the elastic body l shown in the first diagram.
This is an example in which a part of the tooth IC shown in the first illustrated embodiment is constituted by a tooth ID with a low height to form an uneven portion in a part of the elastic body l.
第５図は第１図示弾性体ｌの更に他の実施例を示すもの
で、騒音を発生させる可能性のある振動波の波長λのγ
λ／２に対応した位置に、第１図示実施例に示される溝
ＩＡの幅ｔ、とは異なる幅ｔ２の溝ＩＥを設け、これに
より弾性体ｌの一部に不均一部分を形成した例である。FIG. 5 shows still another embodiment of the elastic body l shown in FIG.
An example in which a groove IE having a width t2 different from the width t of the groove IA shown in the first illustrated embodiment is provided at a position corresponding to λ/2, thereby forming a non-uniform portion in a part of the elastic body l. It is.
尚、第５図示実施例では溝の幅を広（したが、溝ＩＥの
幅を逆に狭（しても同様な効果が得られるものである。In the fifth illustrated embodiment, the width of the groove is widened, but the same effect can be obtained even if the width of the groove IE is narrowed.
第６図は第１図示弾性体ｌの他の実施例を示すもので、
騒音を発生させる可能性のある振動波の波長λのγλ／
２に対応した位置における弾性体ｌの幅を変えること（
該実施例では幅を狭くした例を示す）よって弾性体ｌに
不均一な部分を設けた例である。尚、第６図における縦
の溝ＩＦは内側、外側の両側に溝を設けることによって
形成されているが、この溝ＩＦは内側、若しくは外側の
いずれか一方の溝で形成してもよい。また溝ＩＦの部分
の材質／
を他の部分の材質と変えても同様な効果が得られる。FIG. 6 shows another embodiment of the elastic body l shown in the first diagram.
γλ/ of the wavelength λ of vibration waves that may generate noise
Changing the width of the elastic body l at the position corresponding to 2 (
(This example shows an example in which the width is narrowed.) Therefore, this is an example in which the elastic body l is provided with non-uniform portions. Although the vertical groove IF in FIG. 6 is formed by providing grooves on both the inner and outer sides, the groove IF may be formed on either the inner or outer side. Furthermore, the same effect can be obtained even if the material of the groove IF is changed from the material of other parts.
第７図は第１図示弾性体ｌの他の実施例を示し、歯ＩＣ
を有しない平らな弾性体ｌの一部、即ち騒音を発生させ
る可能性のある振動波の波長λのγλ／２に夛応した位
置に溝ＩＧを設け、弾性体ｌに不均一部分を形成した例
である。尚、溝ＩＧに代えて、この部分を他の部分より
高くしても良い。また第７図示実施例の場合には溝ＩＧ
を弾性体ｌの上面に設けたが、これを下面に設けても同
様な効果が得られる。更に弾性体ｌに設ける代りにロー
タ３の上面に第７図示の溝ＩＧの様な溝（不図示）を設
けても良い。FIG. 7 shows another embodiment of the elastic body l shown in the first diagram, and the tooth IC
A groove IG is provided in a part of the flat elastic body l that does not have a noise, that is, at a position corresponding to γλ/2 of the wavelength λ of the vibration wave that may generate noise, thereby forming a non-uniform part in the elastic body l. This is an example. Note that instead of the groove IG, this portion may be made higher than the other portions. In addition, in the case of the seventh illustrated embodiment, the groove IG
is provided on the upper surface of the elastic body l, but the same effect can be obtained even if it is provided on the lower surface. Furthermore, instead of providing the elastic body 1, a groove (not shown) like the groove IG shown in FIG. 7 may be provided on the upper surface of the rotor 3.
第８図は第１図示弾性体ｌの他の実施例を示し、第４図
示歯ＩＤの代りに歯ＩＤより広い幅を有する歯ＩＨを設
けた例である。FIG. 8 shows another embodiment of the elastic body l shown in the first diagram, in which a tooth IH having a width wider than the tooth ID is provided in place of the tooth ID shown in the fourth diagram.
第９図は第１図示弾性体ｌの更に他の実施例を示し、第
１図示溝ＩＢに代えて、該溝ＩＢの位置に所定の深さの
穴ＩＪを設けた例であり、また第１Ｏ図は鎖式ＩＪの代
りに突起物を固着して、弾性体ｌに不均一部分を設けた
例である。FIG. 9 shows still another embodiment of the first illustrated elastic body l, in which a hole IJ of a predetermined depth is provided at the position of the first illustrated groove IB in place of the first illustrated groove IB. Figure 1O is an example in which a protrusion is fixed instead of a chain type IJ to provide an uneven portion on the elastic body l.
尚、以上の実施例は円環状の振動波モータの例であった
が、本発明はかかる振動波モータだけではな（、弾性体
が円板状、長円形の振動波モータにも適用できるだけで
なく、弾性体自身が進行性振動波によって移動する形式
の振動波モータにも適用出来るものである。Although the above embodiment is an example of an annular vibration wave motor, the present invention is applicable not only to such vibration wave motors (but also to vibration wave motors in which the elastic body is disc-shaped or oval). It can also be applied to a vibration wave motor in which the elastic body itself moves by progressive vibration waves.
以上の様に、本発明では弾性体、振動絶縁体、出力伝達
体等の振動波装置の少なくとも１つの部材上溝、突起物
、穴等の手段を設けたので、実用上大きな問題となって
いた騒音を抑えることが出来たものである。As described above, in the present invention, means such as grooves, protrusions, holes, etc. are provided on at least one member of a vibration wave device such as an elastic body, a vibration insulator, and an output transmitting body, which poses a big problem in practical use. It was possible to suppress the noise.
第１図は本発明を適用した一眼レフカメラ用撮影レンズ
における振動波モータの要部分解斜視図、第２図は従来
の振動波モータを適用した撮影レンズの縦断面図、
第３図は第２図示振動波モータの要部斜視図、第４図及
至第１Ｏ図は本発明を適用した振動波もモータの要部斜
視図である。
図において、ｌ・・・弾性体、２・・・圧電素子、３・
・・ロー々、４・・・振動絶縁体、１２・・・振動波モ
ータを有する振動波装置を構成する外筒、２５・・・出
力伝達体である。Fig. 1 is an exploded perspective view of a main part of a vibration wave motor in a single-lens reflex camera photographic lens to which the present invention is applied, Fig. 2 is a vertical cross-sectional view of a photographic lens to which a conventional vibration wave motor is applied, and Fig. 2 is a perspective view of a main part of a vibration wave motor shown in FIG. 2, and FIGS. 4 to 1O are perspective views of a main part of a vibration wave motor to which the present invention is applied. In the figure, l...elastic body, 2... piezoelectric element, 3...
... Rows, 4... Vibration insulator, 12... Outer cylinder constituting a vibration wave device having a vibration wave motor, 25... Output transmission body.
Claims (1)
−機械エネルギー変換手段とを有し、前記進行性振動波
を駆動源とする振動波装置において、該振動波装置の少
なくとも１つの部材上における騒音を発生させる可能性
のある振動波の波長の１／２の整数倍或いはほぼ整数倍
の位置に該部材の動剛性を不均一とする手段を設けたこ
とを特徴とする振動波装置。A vibration wave device comprising an elastic body and an electro-mechanical energy conversion means for generating a progressive vibration wave in the elastic body, and using the progressive vibration wave as a driving source, at least one member of the vibration wave device. A vibration wave device characterized in that means for making the dynamic rigidity of the member non-uniform is provided at a position at an integral multiple or approximately an integral multiple of 1/2 of the wavelength of the vibration wave that may generate noise. .
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1035348A JP2698412B2 (en) | 1989-02-14 | 1989-02-14 | Vibration wave device |
| DE69030827T DE69030827T2 (en) | 1989-02-14 | 1990-02-14 | Vibration wave motor |
| EP90102905A EP0383309B1 (en) | 1989-02-14 | 1990-02-14 | Vibration wave motor |
| US07/827,866 US5300850A (en) | 1989-02-14 | 1992-01-30 | Vibration wave motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1035348A JP2698412B2 (en) | 1989-02-14 | 1989-02-14 | Vibration wave device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02214477A true JPH02214477A (en) | 1990-08-27 |
| JP2698412B2 JP2698412B2 (en) | 1998-01-19 |
Family
ID=12439357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1035348A Expired - Lifetime JP2698412B2 (en) | 1989-02-14 | 1989-02-14 | Vibration wave device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2698412B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5432394A (en) * | 1993-06-25 | 1995-07-11 | Nikon Corporation | Ultrasonic motor having a vibratory body and method of producing the same |
| US7245058B2 (en) | 2001-12-07 | 2007-07-17 | Canon Kabushiki Kaisha | Vibration wave driving apparatus, and method of setting shape of support member supporting elastic member forming vibration member of vibration wave driving apparatus |
| JP2009165231A (en) * | 2007-12-28 | 2009-07-23 | Canon Inc | Oscillatory wave driving device and device using the same |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61116979A (en) * | 1984-11-08 | 1986-06-04 | Matsushita Electric Ind Co Ltd | Supersonic wave drive motor |
| JPS61116978A (en) * | 1984-11-08 | 1986-06-04 | Matsushita Electric Ind Co Ltd | Supersonic wave drive motor |
| JPS62193569A (en) * | 1986-02-18 | 1987-08-25 | Matsushita Electric Ind Co Ltd | Ultrasonic motor |
| JPS63240382A (en) * | 1987-03-26 | 1988-10-06 | Matsushita Electric Ind Co Ltd | Ultrasonic motor |
| JPS63268476A (en) * | 1987-04-27 | 1988-11-07 | Canon Inc | Oscillatory wave motor |
-
1989
- 1989-02-14 JP JP1035348A patent/JP2698412B2/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61116979A (en) * | 1984-11-08 | 1986-06-04 | Matsushita Electric Ind Co Ltd | Supersonic wave drive motor |
| JPS61116978A (en) * | 1984-11-08 | 1986-06-04 | Matsushita Electric Ind Co Ltd | Supersonic wave drive motor |
| JPS62193569A (en) * | 1986-02-18 | 1987-08-25 | Matsushita Electric Ind Co Ltd | Ultrasonic motor |
| JPS63240382A (en) * | 1987-03-26 | 1988-10-06 | Matsushita Electric Ind Co Ltd | Ultrasonic motor |
| JPS63268476A (en) * | 1987-04-27 | 1988-11-07 | Canon Inc | Oscillatory wave motor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5432394A (en) * | 1993-06-25 | 1995-07-11 | Nikon Corporation | Ultrasonic motor having a vibratory body and method of producing the same |
| US5682805A (en) * | 1993-06-25 | 1997-11-04 | Nikon Corporation | Ultrasonic motor having a vibratory body and method of producing the same |
| US7245058B2 (en) | 2001-12-07 | 2007-07-17 | Canon Kabushiki Kaisha | Vibration wave driving apparatus, and method of setting shape of support member supporting elastic member forming vibration member of vibration wave driving apparatus |
| JP2009165231A (en) * | 2007-12-28 | 2009-07-23 | Canon Inc | Oscillatory wave driving device and device using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2698412B2 (en) | 1998-01-19 |
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